Su ısıtma uygulaması için güneşi takip eden parabolik çanak toplayıcısının kullanılması.

Öz

Bu çalışmada, Diyarbakır ili iklim koşullarında güneşi iki eksende takip eden parabolik çanak kolektörden sıcak su elde edilmesi amaçlanmıştır. Sistemin odak noktasında bakır spiral elemanlı ısı eşanjörü soğurucu olarak tasarlanmıştır. Şebekeden gelen su, absorbırde ısıtılarak sistemden çıkar. Deneysel veriler saat 10: 00'dan 16: 30'a kadar alınmıştır. Kütlesel debinin verimlilik üzerindeki etkisi 0,00187, 0,00217 ve 0,00345 kg/s'lik üç durum dikkate alınarak incelenmiştir. Sonuçlar, en yüksek faydalı ısı miktarının ve termal verimin 0,00345 kg/s'de elde edildiğini gösterdi. Isıl verim değerleri %32-39 olarak belirlenmiştir. Sistemin ekserji verimi de deneysel verilere göre % 5,7 ile 6,3 olarak tespit edilmiştir.

Anahtar Kelimeler

• Parabolik çanak kolektör
• su ısıtma
• spiral absorbır

Utilization of a sun-tracking parabolic dish collector for water heating application

Abstract

In this study, it is aimed to obtain hot water through a parabolic dish mirror tracking the sun in two axes in climatic conditions of Diyarbakır, Turkey. A heat exchanger of copper spiral element was designed as an absorber on the focus point of the system. Water coming from network exits from the system by heated in the absorber. The experimental data was acquired from 10:00 to 16:30 o’clock. The effect of mass flow rate on efficiency was studied considering three cases of 0.00187, 0.00217 and 0.00345 kg/s. The results indicated that the highest useful heat amount and thermal efficiency were obtained at 0.00345 kg/s. The thermal efficiency values were determined as 32 to 39%. The exergy efficiency of the system was also evaluated as 5.7 to 6.3% according to the experimental data.

Keywords

• water heating
• parabolic dish solar collector
• spiral absorber

Kaynakça

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